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Note 15 - Selected Quarterly Financial Information (Unaudited) (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Asset Impairment Charges, Total |  |  |  | $ 174,700 | $ 0 | $ 993
Gain (Loss) on Disposition of Business, Including Nonrecurring Gain Related to Property Closures | $ 53,900 |  |  |  |  |
Gain (Loss) on Extinguishment of Debt, Total |  |  | $ (34,200) | $ (1,791) | $ (34,949) | $ (61)
COVID-19 Pandemic [Member] |  |  |  |  |  |
Asset Impairment Charges, Total |  | $ 171,100 |  |  |  |

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